In my sector (commercial maritime):
As insofar as metals are considered, steel is king. But more and more "exotic" high tensile stuff is being used. However, the biggest problem is corrosion, the holy grail would be a coating for ballast tanks that would last 25 years (Ie, the life of an normal vessel) permitting more creative hull shapes.
In composites, I see far more advance in the resins and the "fillers" than the fibre itself. Curing techniques and all that too.
Another thing that is in testing are composite blades with only the leading edge being metal.